Missing addon errors on a couple of maps

[MasterNe0]

For some reason. When I try to play some missions like PMC Ranger Campaign and some others, i get the error "Missing addon: sg_weaponpack"

I however have the addon but get the error. The funny thing is that the addon isn't part of the maps so Im not sure why it doing this?
I also try deleting the addon and still get the error. I try deleting all the SG perfix but it didn't help

Anything I can do to fix this bug error of this damn addon?

(This addon is part of spanky-g Life story 2) campaign.